Friction-clutch.



H. H. LHHHW.

TRIOTION CLUTCH.

Arrmorrxon rum) ula, mc.

l2. W JACOBS d'.

Nov. 155, wher.'

Pvlenfod ail/Zwan h. Y?. JACOBS 61 H. H. LAHNIHG.

Patented Nov. l5. 1S

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vatioii. of the huh of a pulle v to iv iieh our v on the line .2. of Fig. 1.

v gearing is needed.

. of Fig. i'.

` are operated b v a single ever. or other netnxFig. is a erol sectional view ou the line UNITED STATES PATENT OFFICE.

" anun w. .moons Ann iiowann ii. Lumina. or Torrita, lullin.

PR!C'IION-CLUTCH.l

peoltlcltloii o! Letters Patent. Patented NOV. 15, 1910.

Application Med April l. 1910. Serial lo. tilt 'l'o all whom it may ronrrrn.' l

Ito it known that we. llizxnv W. Jaron and llou van ll. Laxman. citizens of the l liiiied States. rewiding at Topeka. iii the: county of Shawnee and State ot' Kain'ae, have invented certain new and useful lmproveinentin Friction'(lutehem ot' which tho' invention relates to rluti'ln'l ot' the I vpe in which power and motion are transmitted h v trirtion from one cylindrical element to another. and in which one of said elena-nb is divided into parts. the said pai-ts being capable ot' relativil movement` h v wliieh they are brought into frivtionuleon iaet with the otliei' element.'

Figure l is a sectional view. partlv in eleiniproved elnteh has been applied. Fig. l is a detail showing the gear which aetnates the movable partal ot' one element of thc elnteli. Fig. 1" is an enlarged leetional detail view of part ofthe structure shown in Fig. l. the section heilig taken ao represented at the right oi Fig. 1. Fig. :l is an axial section of said pulley and eluteh taken Fig. Il is :i detail in sei-tion taken on the line it, :t of Fig. l. Fig. l i# an axial section showing a modification of the means. whereby one of the eluteh elenient.-. is secured to the shaft. Intliis view two nilleys are shown attached to a shaft. with clutches ap lied thereto, which ating means. ln this view' oni` of the pulleys and itreluteli ai'e shown in elevation with a portion ot' thi* palle)l run broken away.

.'v. 5 of Fig. -t. Fig. ti is a sectional detail iiloiig the line (i. (i ol' Fig. .'i. Fig. i' is a scctional view of our eluteli as applied to i' shaft which transmits its "power to anothe.l .Shaft at right angles thereto. This forili of our invention is particularly adapted for use in automobiles. or where a reversing Fig. S is a cross neet ion anlmtantially along the lineH. H of Fig. i'. Fig. tl in a eraan section along the line l), t) Fig. tl" is a sectional detail on line tl* of Fig. 'i'. Fit'. tt) is a sectional view partly iu elevation of the hub of a pulley in which a nioditied -forin of our clutch is used. Fig. ll is an axial section of the mime taken on thcline 11, 11 of Fig. 10. F ig. 12 ia a crono section substantially on' thel lino 12. 12 of Figs. 13 and 11. Fig. 13 is au Y will therefore axial section of a portion of the clutch taken along the line 13. I3 of Fig. 12.

Similar numerals of reference are applied to similar parts in the ditl'ereut views.

We accomplish the principal ob'ect. of our invention by means of the smal gear or pinion QB which has an elongated hub 2T threaded upon right and lcft hand screws all. 'Ihcae screws 22) arel pivotally attached to the movable parts of one of the clutch elements. lliis clutch element has a cylindrical forni and is divided into ,two parts which will be described later, the said parts being given a movement to cause them to engage another hollow cylindrical clement hy ineunsof the said screws.

fc preferably place the divided clutch element within'tho hollow ring or c lindrical hub of tho driven clement. t c may, however, place the divided clutch clement. on the exterior of the said driven clement, in which ease the parts of the driving elcinent will be inovci inwardly when brought. into engagement with the driven element.

Referring moic particularly to Figs. 1 and i! of the drawings, itl will be seen that we have applied our clutch to n pulley 15, which has an enlarged lnib 16 in which there is a cvlindrieal bore for receivin thc driving e ement of our clutch. It is o course immaterial which of the two elements of our eluteh mechanism be considered 'the driving element. it being obvious that power may be transmitted in either direction from one element to thc other. .For convenience in descri tion, however we refer to the friction e einents 24 and 25 and corresponding parts in the other forms of thc structure as the driving element, but do not limit oureelvea to the use of the structure in this manuel :is it will be obvious that power muy be ap lied tothe pulley and transmitted from t iere to the shaft.

The lille 15 is loosely mounted upon the shaft 1 an ia held y inst endwisc movement by the collar 18. e inner or driving clutcheloinent. is held n inst endwine movenient in the other direction bythe collar 19. The collars 18 and 19 are `secured ri idly to the aluift by oet screws 20 and 21. ic ro tary motion in transmitted from the shaft 17 to hc inner or driving element by means of the key 17'. The .inner or drivin clutch elements have an ond bearing at 6' upon the hub of the pilley or driven clement. It leen that thev parts are on the .shaft i7.

gcther are cylin rical in their general forni spherical ends which hear upon a correydirection of the rotation o the said gear.

ellicieiitli` held in proper relative position',

'lhe huh of the iulley l5 is provided with the bushing 22, wliieh hears upon the shaft i i7, aiulsiiid hashing is liehl in place h v ii f pin 23.

The inner or driving clutch member is divided into two parts` 24 und 25 which are pivoted to euch other h v means of the pin 24. 'llie two iai-ts 24 aiid 25 taken toaiul the pivot pin 24 joins them together at a point ncar their cimnnitcrential surface.

lhe part 24 is provided with eyes 24" hetwt'cn which is inserted an cye 25 on the part 2li. The pinl 24 is inserted through said c yes`24" and 25 and in this manner the said parts are plvotally connected.

In the parts 24 and 25 we [lirovidc sockets or cavities 2G in which are vliiaeed the hubs 27 of the gear 28. These soc ets are located in that part of the driving clement which is o pointe tn the pivot pin 24.

'llhe gear 28 has elongated hubs 27 which project in opposite directions freni the body of-the gear, uiid each one of the elongated portions 27 is placed in one of the sockets 20 in one of the iuris 24 and 25.

The clon atet hubs 27 are internally threaded an( fitted to screws 29 which arc piivotally attached to the parts 24 and y placin the female member, i. e., the internally t readed .sleeve 27 carried hy the s ur gear 28, in the center and mounting tie male screw 29 upon the friction meinbers the mechanism can be applied to n smaller clutch titan if the reverse arrangement were adopted. 'lhe smaller diameter of the male screw 29 renders it. possible to locate its spherical seat coniparativclv close to the outer ciirred surface of the i-ietion member in which it is mounted. The crews 20 are provided with heads 80, which have spending spherical seat 8l* in the parts 24 and 25.

The threads of the screws 20 are right and left, respectively, so that when the gear 28 is 'rotated the screws 29 arc caused to move inwardly'or outwardly de riding upon the The ear 28 meshes with a rack 38 which is litt to the groove 39 in the shaft 17. The rack 88 is provided with autlicient teeth to roporl nieah withtlic ar 28 and give it ie dea red movement. llshe rack haa an extension-38* which is provided with lugs 40 for reeeivin an operating sleeve 4.1". The oltratin ring 42 is litted to this sleeve and is provi( ed with pins 42' to which an operating lever ma bc pivoted,viis is coinmon in clinch mec aiiism and which it is not thought necessary to illustrate in thesev drawings'.

Referring again to the screws 2t it will he seen that they have slots 31 in their heads, whereby a screw driver may he used for aduating them. This adjustment will hc ma e through an aperture 32 iii the parts of the driving `element 24, when the said aperture is brought into register with a' similar aperture 33 in the hub of the pulley or driven clement.

The screws 29 are pivotally attached to the parts 24 and 25h pins 34 which are titte( to .said heads an to suitable holes in the parta 24 and 25 adjacent thereto. This construction is more fully shown in Fi 6.

screw driver to the slot 31" in the head 30,v

an adjustment of the screws in the gear 28 may be inade for the urpose of `takin up the wear of the arta 4 and 25 of the rivinieleincnt oft e clutch.

lie cavitiesI 26 are oval or a proximately elliptical in cross section, as siowr'i in the drawing, articularl; in Figs. 1, 1" 3, 9 and 10. Ass own in t e drawings the larger dimensions of the cavities 26 permit a limited rotation of the screws 29 on their pivot pins 34, but at the points midway between the clearance spaces the screws 29 and hubs 27 of the gears 28 have a snug bearing upon the inner surface of the cavities 26, thereby It will be noted that. the gear 28 with-its haha 27 is support-ed exclusivel upon the screws 2t) which are pivoted to t e movable friction niembera'24, thus leavin the ar willi its hubs free to nieve towa and rom the point of ivotiil connection between the friction inem rs 24 as said members are se arated or drawn together in a plying or re easing the clutch, und that tie pivotal mounting of lthe screws 20 screws to aline 'with the hubs 2 of the gear 28 in all .it.ioiis.

Rcferain again to Fig. 1 thc ins 34 and 35 are het in position by sp it keyfr 36 which lie over the heads of said pini-i and are held iii this position by poets 37, which have apcrturea in which the said keyu 8( are placed. y

rniits. the

two halves are venom given parallel engaging niolions. The pears 00 and 91 are operated the shaft.

siuuiltaneou hy the racks il? and tll. e-

cnuse of the uct. that the said racks engu've 5 the gears 90 and 91 at opposite sides, tie

said gears 90 and ill will have rotarly movements iu opposite directions, und tierefore the corresponding screw threads of the Screws U4 and h5 will hure to lie o ipositely arranged. In

other words. the tiread of the screw 04 will be leftdiiinded while the thread of screw 05 will he riglitthanded. in all other respects the mechanism is duplicated on the opp in this modifie osite sides of the shaft. ation of our invention it heroines necessary to provide a dill'e'reiit incline-i for transmitting t ie rotary motou of the shaft to the drivinp eleinent'of the clutch. 'Ihe two parts ie have a rectilinear motion when actuated, so that sa id parts will move simultaneously only in parallel hav'o provided of t driving elements will directions away from or toward order to transmit the said in ider these conditions, we pins titl and il?, which are fixed inthe two parts 9S and till of the driving element and which project into radially 100 und lill in the ring 102.

disposed slots Ihe rin 102 shaft lill is rotatigely secured i'o the ln the manner described ln enuliection with thel ring-l1 in the forni -shown this of o in Fi 4, ."i and (l. lu everv other res iect oriu ur invention issuhstantially the sinne as previously described.

The.V operation been largely referred to. and it may read of' our invention has alfilrt er be mentioned that the shaft i7 univ he considered the driving shaft, which iisnally is connected to iin engine or motor or other tary motion rime inot'or. The iower and of the shaft 17 is transmitted to the two parts 24 and 25 by the key 17'.

The

the necessary said parts, but

tirely immaterial. The .o

commonly operated.

parts 24 and 25 of the driving element tit the said key 17 loosely in order to .permit clutching movement of the this loose lit. is otherwise enriitor may cause with the riven element by lever connected with the ring manner in which clutches are The ring 42 transmits its motion to the sleeve 41,' which in turn transmits the motion to the rack bar 38,

and the rack teeth the gear 28. The said `movement. of the screw held against rotation 38 cause the rotation of gea!` 28 will cause a 20 the latter heim; hy tie pin 34. It is understmxl, of course, that the gear 28 transmits the sind movement to two screws 20.

euch .of which i the parte 24 an 'lhe movement inner cylindric s tfiivotall attached to one of 25 of he driven element. imparted to the parts 24 and bo pressed against the ai surface of the driven ele- 3 P "5 ment with greater or less frce, depending upon the iressure exerted hy the operator upon the ever which actuates the ring 42. lly means of this screw principle, we are enabled to apply the pressure between the clutch elements very gradually by a steady 'lo pressure of the o mtors hand on the controlling lever. y the use of this principle a sudden shock or jar is entirel prevented.

In use of other forms of clutc es, particularl those in which a wedging connection is usci the operator finds it necessary to cause the engagement of the clutch elements by s sudden movement of the lever.

By the use of our screw principle, we are enabled to produce n heavy pressure on thc no friction surfaces bv a plying s light res. sure to the control er ever. We are t erefoi'e enabled to use relatively small friction surfaces and a very light controlling inechanisni, iuid our clutch -inay be compact and simple form. Our clutch is also self adjusting, for the reason that as the surfaces become worn away, the range ofI movement. of the screws necessary to brin the friction surfaces into contact no grat uiilly increases und takes up .the wear. This range of movement will continue as the wear increases until the clutch elements becomo worn to such a degree that the sliding i'lu'lt bar le* comes into contact with tlia iis end of the slot in the shaft 17. W'hen thin condition is reached, the clutch may be reset hy removing the pins 84 and 85, or 34' tand 34'. and the necessary rotation may be easily given to the screws 20 to restore the 100 clutch to the proper working adjustment'. The screws 29 '.uay be reached by a screw driver through the apcrturesdil and 88, as previously described. The ins 34 and 35 or sitions. In performing this adjustment and in the removal ofv the said pins 34 and 35, it will, of course. b'e necessary to first remove the split pin 36. In performing this adustnient in connection with the modified orm n0 shown in Fi 4, Il and tl, it ip necessa toI that loosen t ie small set screws 34, w iich may bo reached by rotstin the driven elea nient Yor pulley l5 until tio apertures 84 are in register with tho apertures in which 1lb the slet screws are placed.

In the modified form shown in Figs. 4, 5 and 6, the driving element ma be very conveniently removed for inspec ion or repair by loossnin the screws 52, i tion will al ow the conical wedge or rin 50 to become easil disenga from the aft li". By loosen ng the eo ar, the ulley may also he slid along the shaft an the parts are thus made entirely accessible. 125

Inthe modified form shown in Figs. 10, l1l. l? and '13. the frictionthsurfsctes are iroug it into engagement wi er acl ciiracy and the wear is more unifdiem, and

this advantage will be suilicisn't to .warrant up given a ver? un 8l' and 84' may then heres orcd to their po- 105 which opera? 0 I sum1 of said shaft tliroughtheslpt in said inner ring and sxgagng md Runen. of said screws midway between said cleal 6. In a n non clutc pivoter] friction snee spaoes.

elements, oppositely disposed mveraely In testimony whereof, we have subscribe s thnded screwsi pivld :n said friction ele our names.

men a screw t area s eeve enga mg sai v, screwe, said sleeve and screws beirfg s eated in recesses in said friction elements, sand receases being elongated in cross section form- Witnesses:

=i clearance spaces to permit rotation of Fa/mx M11-cnam,

said screws on their pivots but forming a D. C. Txon w.

snug bearing upon said sleeve and tho hou` 

